The Ford Company introduced the ‘600 Series’ range in 1975. The line-up included the 2600, 3600, 4600, 5600, 6600 and 7600 machines. The new tractors could be distinguished from their predecessors by their plain black front grilles, larger exhaust silencers and curved Q-cabs. The ‘600 Series’ tractors were more fuel efficient than their predecessors and had improved hydraulics. ‘Dual Power’ could be specified instead of the standard gearbox, and this doubled the number of available gears to sixteen forward and four reverse speeds.